Blade movement for electric razors



Nova, 4 B92@ H. C. KENNEY BLADE MOVEMENT FOR ELECTRIC RAZoRs Filed May 29, 1923 Patented Nov. 4, 1924. UNITED STATES PATENT OFFICE.

HILTON C. KIENNEY, OF' NEW ILONDON, CONNECTICUT, ASSIGNR T0 lCHARLES H.

XENNEY, F NEW LONDON, CONNECTICUT.

BLADE MOVEMENT FOR ELECTRIC RAZORS.

Application mea my 29, 192s. serial mi. 642,226.

To all whom it muy concem:

Be it known that I, HILTON C. KENNEY, a citizen of the United States, residing in New London, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Blade Movements for Electric Razors, of which the following is a specification.

The present invention relates to an electrically operated razor of the type disclosed in U. S. nding application, Serial No. 453,020, filed March 17, 1921, and is deemed to be an improvement thereon.

One of the objects of this invention is to provide a safety razor in which the blade is electrically operated to describe an up- Ward and forward and backward and downward movement during each oscillation, to thereby impart a shearing effect forward and backward during each stroke of the blade. This movement brings into use the microscopic teeth always present on the cuttin edge of a blade.

other object of the invention is to provide such a razor having the blade itself directly operated, rather than a blade holder being the operated member, which makes the action more positive, and which reduces the number of pants as well vas the weight and thickness of the shaving end of the razor.

Another object of the invention is to provide a razor of this kind having a guard which may be removed without removing the blade, so that the blade may be stropped; or, used as the common straight razor.

Other objects of the invention are to improve generally the simplicity and efliciency -of such devices and to provide a razor of this kind which is durable, economical to manufacture and which will not get out of order.

Other objects of the invention will appear as the description proceeds; and while herein details of the invention are described, the invention is not limited to these, since many and various changes may be made without departing from the scope of the invention as claimed.

In the accompan 'ng drawings, Fig. 1 is a side longitudina view, actual size and partly in section, of the razor in position for use.

Fig. 2 is a -top view of the blade ortion of the razor on the same scale as ig. 1.

Fig. 3 is an enlarged view of Fig. 2, with outer edge portions curve parts broken away to show details of construction.

Fig. 4 is a longitudinal sectional view on line 4 4 of Fig. 3. f

Fig. 5 is a transverse sectional view on line 5 5 of 3.

Fig. l6 is a sectional view on line 6 6 of Fig. 3, with the guard removed.

The razor shown in the drawing, Fig. 1, is composed of a handle portion, generally denoted by H, having anV electrically operated plunger 10, which may be such as shown in the hereinbefore mentioned application for Letters Paten-t; and a shavm portion, generally denoted by B, attache to said handle H and extending in the longitudinal plane thereof.

lhe part B comprises an elongated base portion or blade support 15 having a topl flat surface and a rounded under side curving from the center tothe side edges of said fiat surface, which curved under side is provided with parallel;- inwardly extending wedge shaped grooves 11 lengthwise of the support 15. A guard member 12 of proper length is provided having its lengthwise central ortion shaped to conform to the under si e of said su port 15, and its d) and serrated to form teeth 16. Along the support conform ing surface of guard member 12 are wedge shaped projections or ridges 13 adapted to cooperate with said grooves 11 to slidably receive guard 12 on base. 15. The guard 12 may be made suiciently resilient and the grooves 11 and ridges 13l small enough, so that the guard may be snapped or pressed on to the support 15, and removed therefrom by pressing on one side of Ithe guard 12, therebyv pulling the ridge on such side out of its groove.

One end of the base 15 terminates in an internally threaded cylindrical portion 18, Figs. 3 and 4, which is received on the externally threaded end 20 of handle H. A semi-circular opening cut in the base at its 'unction with part 18 forms a chamber 22 mto which extends the plunger 10; while the other end of base portion 15 terminates in a half hinge portion 23. On either side of a. central bridge portion 24, there are provided in the base 15 elongated recesses 30 and 31, the mean ends of which recesses extend into said bridge 24 to form spring-receiving seats 33 and 34; while the opposite or extreme ends of recesses 30 and 31 are circular. Near the circular ends of recesses 30 and 31 these recesses extend outwardly as at 36 and 37. Through the base 15 and extending up through the recesses 36 and 37 there are provided studs 40, Fig. 5, and 41, upon which there are pivotally mounted arms 42 and 45, respectively, of heads 43 and 44, which heads lie in, but are of slightly less width than, recesses 30 and `31. T he heads 43 and 44 each have a spring-receiving seat, 46 and 47 facing the seats 33 and 34, respectively.

Seated in recesses 30 and 31 are flat cor-v rugated springs 50 and 51 having their ends disposed in the seats 33 and 46, and 34 and 47, respectively. The springs 50 and 51 are always under compression, and therefore, when the blade is not mounted, maintain the heads 43 and 44 in the ends of recesses 30 and 31. A Hat, double-edged blade 60 is provided having an elongated slot 61 of practically the same width as heads 43 and 44, the ends of which slot conform thereto, and the length of which slot 61 1s equal to the distance from the circular end of recess '30 to the circular end of recess 31 less the stroke of the blade 60.

The blade 60 is mounted by placing one end of the slot therein over head and compressing spring 51 until the opposite end of the slot is received over head 43. When blade 60 is placed in this position one end thereof contacts with plunger 10, as at 63,

Hat blade-retaining cover 65 has at one end a portion 66 cooperating with part 23 to form a hinge; and at its other end terminates in a thumb tab 67 having a recess 68 adapted to' snap over a projection 69 mounted in the cylindricalhandle attaching portion 18. The under side of cover 65 is iecessed so that when in closed position it rests without pressure on heads 43 and 44, Figs. 4 and 5, which heads extend slightly above the blade 60, thus allowing free movement of the blade.

From the foregoing it will be seen that as the lunger 10 moves further out of the handle into chamber `22, as shown by dotted lines in Fig. 4, the blade is pushed against head 43 compressing spring 50. At the same time spring 51 extends against lug 44. The lugs or heads 43 and 44, when the blade is in position, lie to one and the same side of the perpendicular from their pivot members, which are in longitudinal alinement, and when pressed by the blade 60 and plunger 10, move upwardly and forv wardly about their pivots carrying the blade always in perfect longitudinal alinement, giving to the blade a shearing movement. n the present instance the length of stroke of plunger 10 is equal to the distance from the center of the heads 43 and 44 to a permitting spring 50 to extend and bring the blade back to normal position. The spring 70 in handle H merely serves to hold the plunger 10 in contact with blade 60, and lis of less tensional strength than spring 50. Spring 51 is also of less tensional strength than spring 50 and primarily serves to move the head 44 in longitudinal alinement with head 43 at all times.

Having rthus described my invention, I claim:

1. A razor, comprising a handle; a reversible blade having its longitudinal axis in alinement with the longitudinal axis of said handle; and means for moving said blade away from and back to said handle axis. 2. A razor, comprising a handle a reversible vblade having its longitudinal axis in alinement with the longitudinal axis of said handle; and means for moving said blade away from and back to said handle axis, during which movement said blade and handle are at all times in longitudinal alinement. y

3. A razor, comprisn a handle having a reciprocating shaft; a b ade support in longitudinal axial alinement with said handle; a blade; and means for mounting said blade Aon said support and for yieldably holding said blade against'said shaft.

4. A razor, comprising'a handle having a reci rocating shaft; a recessed blade support in ongitudinal axial alinement with said handle; a blade; and means in said support recess for mountin said blade on said support and for yiel ably'holding said blade in contact with said shaft.

5.. A razor, comprisin a handle having a reciprocating shaft; a b ade support in longitudinal axial alinement with said handle; and a blade pivotally mountedon said support and in yieldable contact with said shaft.

6. A razor, comprising a handle having a reciprocating shaft; a blade support in longitudinal axial alinement with said handle; a blade pivotally mounted on said support and in yieldable contact with said shaft; and

tain said blade in longitudinal alinement with said support during its movement relative thereto.

8. A razor having a blade support, there being a longitudinal recess in said support; a blade having a longitudinal slot of less length and width than said support recess; lic-ads pivoted in Said recess and adapted to be yieldably extended Within said blade slot to maintain said blade in longitudinal alinement with said support during movement; and a blade retaining member hingedly connected to said support and adapted to cooperate with said heads and support to provide blade bearing surfaces.

9. A razor, comprising a handle having an electrically operated reciprocating shaft; a blade support in longitudinal axial alinement with said handle, there being a recess in said support; a blade having a longitudinal slot of less len th and Width than said support recess; hea pivoted in said recess and adapted to be yieldably extended with said blade slot to maintain said blade in longitudinal alinement with said support and handle during oscillation; means for maintaining said blade and shaft in Contact; a recessed blade retaining cover hingedly connected to said support and adapted to c0- operate with said heads to provide blade bearing surfaces between said cover and support; and a blade guard removably received on said support..

, TON C, KENNEY. 

